Pozoruhodn\u00fd objev u Oregon’s Fossil Lake vrhl sv\u011btlo na slo\u017eit\u00e9 spole\u010densk\u00e9 chov\u00e1n\u00ed starov\u011bk\u00fdch mamut\u016f. T\u00fdm v\u011bdc\u016f odkryl klikat\u00edc\u00ed se \u00fasek 117 stop zanechan\u00fdch st\u00e1dem kolumbijsk\u00fdch mamut\u016f p\u0159ed 43 000 lety.<\/p>\n\n
Stopy zachytily intimn\u00ed okam\u017eik mezi zran\u011bnou dosp\u011blou samic\u00ed a starostliv\u00fdmi ml\u00e1\u010faty, co\u017e poskytuje bezprecedentn\u00ed pohled do dynamiky jejich st\u00e1da. Anal\u00fdza t\u00fdmu nazna\u010duje, \u017ee matriarch\u00e1ln\u00ed struktura mamut\u00edch st\u00e1d, podobn\u00e1 modern\u00edm slon\u016fm, se roz\u0161\u00ed\u0159ila i na p\u00e9\u010di o zran\u011bn\u00e9 \u010dleny.<\/p>\n\n
Na rozd\u00edl od jin\u00fdch zn\u00e1m\u00fdch mamut\u00edch stezek vykazovala stezka Fossil Lake neobvykl\u00e9 vlastnosti. Stopy byly t\u011bsn\u011b rozm\u00edst\u011bny, prav\u00e1 strana byla mnohem hlub\u0161\u00ed ne\u017e lev\u00e1 a stopy zadn\u00ed lev\u00e9 nohy byly obzvl\u00e1\u0161t\u011b slab\u00e9. Tyto anom\u00e1lie vedly v\u011bdce k p\u0159esv\u011bd\u010den\u00ed, \u017ee zv\u00ed\u0159e m\u011blo zran\u011bn\u00ed na lev\u00e9 zadn\u00ed noze, co\u017e zp\u016fsobilo, \u017ee kulhalo a pohybovalo se pomalu.<\/p>\n\n
Mezi stopami dosp\u011bl\u00fdch byly rozpt\u00fdleny men\u0161\u00ed stopy, o nich\u017e se p\u0159edpokl\u00e1d\u00e1, \u017ee pat\u0159\u00ed mlad\u00e9mu mamutovi a ml\u00e1d\u011bti. Tato mlad\u00e1 mamuta se opakovan\u011b vracela k kulhaj\u00edc\u00edmu mamutovi, pravd\u011bpodobn\u011b kontrolovala jeho pokroky a n\u011b\u017en\u011b s n\u00edm komunikovala. V\u011bdci pozorovali podobnosti se soucitn\u00fdm chov\u00e1n\u00edm pozorovan\u00fdm u modern\u00edch africk\u00fdch slon\u016f.<\/p>\n\n
P\u0159edpokl\u00e1d\u00e1 se, \u017ee vedouc\u00ed slon na nalezi\u0161ti Fossil Lake byla samice, a to na z\u00e1klad\u011b p\u0159\u00edtomnosti mlad\u00fdch mamut\u016f a absence stop odpov\u00eddaj\u00edc\u00edch dosp\u011bl\u00e9mu samci. V mamut\u00edch st\u00e1dech, podobn\u011b jako u modern\u00edch slon\u016f, vedly skupinu zpravidla star\u0161\u00ed samice a staraly se o ml\u00e1\u010fata.<\/p>\n\n
V\u00fdjime\u010dn\u00e9 zachov\u00e1n\u00ed stop Fossil Lake je p\u0159i\u010d\u00edt\u00e1no \u0161\u0165astn\u00e9 kombinaci po\u010das\u00ed a geologie. Stopy byly vylept\u00e1ny do sediment\u016f bohat\u00fdch na sope\u010dn\u00fd popel z erupce Mount Saint Helens. Popelov\u00e1 pokr\u00fdvka prom\u011bnila okoln\u00ed travnatou krajinu v bahnit\u00e9 pl\u00e1n\u011b, kter\u00e9 poskytovaly ide\u00e1ln\u00ed povrch pro stopy.<\/p>\n\n
Krom\u011b odhalen\u00ed dynamiky mamut\u00edch st\u00e1d poskytuj\u00ed stopy Fossil Lake tak\u00e9 poznatky o dramatick\u00fdch zm\u011bn\u00e1ch, ke kter\u00fdm v pr\u016fb\u011bhu \u010dasu v ekosyst\u00e9mu do\u0161lo. Anal\u00fdza p\u016fdy proveden\u00e1 v\u00fdzkumn\u00edky nazna\u010duje, \u017ee se oblast v pr\u016fb\u011bhu des\u00edtek tis\u00edc let zm\u011bnila z travnat\u00e9 krajiny na pustou krajinu a zase zp\u011bt. Tento p\u0159echod mohl b\u00fdt ovlivn\u011bn vyhynut\u00edm mamut\u016f a dal\u0161\u00edch velk\u00fdch b\u00fdlo\u017eravc\u016f, kte\u0159\u00ed hr\u00e1li z\u00e1sadn\u00ed roli v udr\u017een\u00ed zdrav\u00ed travnat\u00fdch porost\u016f.<\/p>\n\n
Mamut\u00ed stopy Fossil Lake jsou d\u016fkazem s\u00edly paleontologick\u00fdch objev\u016f osv\u011btluj\u00edc\u00edch \u017eivoty a chov\u00e1n\u00ed starov\u011bk\u00fdch tvor\u016f. Tato vz\u00e1cn\u00e1 a dob\u0159e zachoval\u00e1 stezka nab\u00edz\u00ed jedine\u010dn\u00fd pohled do slo\u017eit\u00e9 spole\u010densk\u00e9 dynamiky mamut\u00edch st\u00e1d a vz\u00e1jemn\u00e9ho p\u016fsoben\u00ed mezi chov\u00e1n\u00edm zv\u00ed\u0159at a zm\u011bnami ekosyst\u00e9m\u016f.<\/p>","protected":false},"excerpt":{"rendered":"
\u017divot mamut\u00edch st\u00e1d odhalen vz\u00e1cn\u00fdmi fosiln\u00edmi stopami Stopy vykresluj\u00ed obraz spole\u010densk\u00e9 dynamiky Pozoruhodn\u00fd objev u Oregon’s Fossil Lake vrhl sv\u011btlo na slo\u017eit\u00e9 spole\u010densk\u00e9 chov\u00e1n\u00ed starov\u011bk\u00fdch mamut\u016f. T\u00fdm v\u011bdc\u016f odkryl klikat\u00edc\u00ed…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[16549,16548,4738,137,99],"class_list":["post-12250","post","type-post","status-publish","format-standard","hentry","category-paleontology","tag-herd-dynamics","tag-fossil-tracks","tag-mammoths","tag-paleontology","tag-lifescienceart"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=12250"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12250\/revisions"}],"predecessor-version":[{"id":12251,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12250\/revisions\/12251"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=12250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=12250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=12250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}